Semicarbazones of 4-phosphorinanones



United States Patent 3,281,463 SEMICARBAZONES 0F 4-PHOSPHORINANONES Richard Parke Welcher, Old Greenwich, Conn., assignor to American Cyanamid Company, New York, N.Y., a corporation of Maine No Drawing. Original application Dec. 22, 1961, Ser. No. 161,438, now Patent No. 3,225,103, dated Dec. 21, 1965. Divided and this application Aug. 9, 1965, Ser. No. 485,973

2 Claims. '(Cl. 260-554) [X=Br, 01 or I] 'ice from the group consisting of substituted and unsubstituted, branched and straight chain alkyl (C -C substituted and unsubstituted cycloalkyl, substituted and unsubstituted aryl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chlor-o-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl; and R represents alkyl having from 1 to 12 carbon atoms.

The 4-phosphorinanone reactants are prepared according to copending US. application, Serial No. 161,405, filed December 22, 1961, now abandoned, by reacting a primary phosphine RPH with a divinyl ketone (1,4-dien- 3-one) of the formula and recovering the corresponding phosphorinanone.

The primary phosphine reactant and the 1,4-dien-3- one reactant are best reacted at a temperature in the range of C. to 200 C. and recovering the resulting 4-phosphorinanone product by volatilization, for example, at a reduced pressure in the range of 0 to 760 millimeters. Reaction is best carried out in a substantially inert atmosphere, such as in a nitrogen or helium atmosphere, or the like. No catalyst or solvent is necessary for the process contemplated herein.

Furthermore, the process is generally carried out at atmospheric pressure. Superatmospheric pressures as high as 700 pounds per square inch may likewise be used, particularly with low 'boiling reactants. Usually, however, very good results are achieved at atmospheric pressure.

Similarly, stoichiometric quantities of the reactants are generally employed. Nevertheless, small excesses of either reactant may be present without detrimentally affecting the nature of the reaction.

Generally, the reactants are heated for at least one hour, but this is not critical since incipient reaction occurs upon inter-mingling the reactants.

Typical primary phosphines useful for producing phosphorinanone reactants within the purview of the instant discovery are pheny-lphosphine, cyclohexylphosphine, dodecylphosphine, isopropylphosphine, benzylphosphine, 2 ethoxyethylphosphine, 2 cyanoethylphosphine, para-chlorophenylphosphine, methylphosphine, isobutylphosphine, ethylphosphine, propylphosphine, butylphosphine, pentylphosphine, hexylphosphine, octylphosphine, heptylphosphine, decylphosphine, undecylphosphine, heptadecylphosphine, octadecylphosphine, etc.

It follows from the above listing that typical substituents for primary alkyl phosphine are lower alkoxy, phenyl, cyano and .the like. Typical .substituents for primary aryl phosphine, such as phenyl phosphine, are halogen (e.g. Cl, Br, and I) lower (alkyl, etc.

In other words, substituents which do not interfere with, enter into, i.e., are inert under the conditions of, the reaction for preparing 4-phosphorinanones are contemplated herein.

Among the divinyl ketones useful for preparing the 4- phosphorinanone reactants of the present invention are:

1,4-heXadien-3-one 1,4-heptadien-3-one 1,4-octadien-3-one 7 -methyl- 1 ,4-octadien-3-one S-methyl-1,4-heXadien-3-one S-methyl-1,4-heptadien-3-one 5 -methyl-1 ,4-octadien-3-one 5 -ethy1- 1 ,4-heptadien-3 -0ne The 4-phosphorinanone reactants prepared as above may be converted to the products of the present invention according to the following typical and conventional processes:

EXAMPLE 1 2,2,6,6-ietram ethyl-1 -phenyl-4-phosphorinano ne-I -sulfide A benzene solution of 1.8 grams of 2,2,6,6-tetramethyl- 1-phenyl-4-phosphorinanone and 0.28 gram of sulfur is heated at 80 C. for minutes. Recrystallization of the product from methanol and hexane yields 2,2,6,6-tetramethyl-1-phenyl-4-phosphorinanone-l-sulfide melting at 138 C.139 C.

6 EXAMPLE 6 2,2,6-trimethyl-1-phenyl-4-ph0sph0rinanone, oxime TABLE II Ex. Tempera- Reaction No. Reactant 4-phosphorinanone Other Reactant ture, 0. According Product to Example 7 1-eyc1OheXyl-Z-ethyM-phosphorinanone Excess heptyl bromide 50 2 1-cyclohexyl-1-heptyl-2-ethyl-4-phosphorinanium bromide. 8 1-dodecyl-2,2-dipropyl-i-phosphorinan- Excess benzyl chloride 80 2 l-benzyl-l-dodecyl-2,2-dipropyl-4- one. phosphorinaniurn chloride. 9 Z-butyl-2(2 methoxyethy1)-1-0ctyl4- Dodeeyl iodide 2 2-butyl-1-dodeeyl-2(2'-methoxyethyl)-1- phosphormanone. octy1-4-phosphorinanium iodide. 10. 2,2,6,6-tetraethyl-3,5-dunethyl-1-pheny1- Propyl bromide 24 2 2,2,6,6-tetraethy1-3,5-dimethylpropyl-1- 4-phosphorinanone. phenyl-4-phosphorinanium chloride. 11 1-propyl 2,6-dnsopropylphenyl-i-phos- Sulfur 5O 1 l-propyl-2,6-diisopropylphenyl-4-phosphorinanone. phorinanone-l-sulfide. 12. 1-(2-ethoxy ethyl)-2,2,6,6-tetraethyl-4- .do 110 1 l-(2-ethcxyethyl)-2,2,6,6-tetraethyl4- phosphorinanone. phosphorinanone-l-sulfide. 13 2,2-diethyl-l-octadecyl-4-ph0sph0r1nan- Phenylhydrazine 60 4 2,2-diethyl-1-octadecyl-4-phosphorinanone. one, phenylhydrazone. 14 2-isobutyl-1-methyl4-phosphor1nanone.. Para-mtrophenylhydrazine. 78 5 2-is0butyl-1-methyl4ph0sph0rinan0ne,

. I para-nitrophenylhydrazone. 15 l-phenyl-B,5-dipropyl-i-phosphorinan- Semicarbazlde H01 and 70 3 l-phenyl-3,5-dipropyl--phosphorinananhydrous potassium one, semicarbazone.

carbonate. 16 l 2-methyl-1,2-diphenyl-4-phospl1orin- Hydroxylamine hydr0- 90 6 2-methyl-1,2-diphenyl-4-phosphorinanone. chloride and base. anone, oxime.

EXAMPLE 2 1 -ethy l-1 -methyl-4-0x0phosphorinanium iodide A mixture of 0.4 gram of 1-ethyl-4-phosphorinanone and 4 grams of methyl iodide in 20 milliliters of other under a nitrogen atmosphere gives a white precipitate on standing. The compound l-ethyl-l-methyl-4-oxophosphorinanium iodide results. After recrystallization from acetone (1 gram/ 130 milliliters) its melting point is 213 C.-214 C.

EXAMPLE 3 1,2,6-triphenyl-4-ph0sph0rinan0ne, semicarbazone A mixture of 0.4 gram semicarbazide hydrochloride and anhydrous potassium carbonate is added to a slurry of 0.9 gram of 1,2,6-triphenyl-4-phosphorinanone in 10 milliliters of 2B alcohol and 1 milliliter of water, the resulting mixture warmed for 10 minutes, cooled and diluted with water. The yield of 1,2,6-triphenyl-4-phosphorinanone, semicarbazone, product is 100% after recrystallization from 2B ethanol.

EXAMPLE 4 1-heptadecyl-2,2,6,6-zetramethyl-4-ph0sphorinanone, phenylhydrazone Z-methyl-I-phenyl-4-ph0sphorinan0ne, pum-n'z'trophenylhydrazone Example 4 is repeated in every essential respect substituting the ketone and hydrazine reactant with Z-methyl- 1-phenyl-4-phosphorinanone and para-nitrophenylhydrazine, respectively.

The sulfide derivatives of the present invention are best produced by reacting stoichiometric amounts of sulfur and the 4-phosphorinanone reactant at temperatures in the range of 50 C. to 150 C. and in the presence of an inert organic solvent. Usually the reaction is carried out at a temperature below the boiling point of the solvent. Typical solvents are aromatic hydrocarbons, e.g., benzene, toluene, xylene, and the like. The resulting product is recovered by recrystallization. The 4-oxophosphorinanium halides are generally produced by reacting stoichiometric amounts of an alkyl halide and a 4-phosphorinanone in a nitrogen atmosphere and in the presence of an ether solvent, or excess alkyl halide, at a temperature in the range of 0 C. to 0, preferably temperatures below the boiling point of the ether solvent when used.

The semicarbazone derivatives of the present invention are usually carried out by reacting semi-carbazine hydrochloride with a weak inorganic or organic base, such as potassium carbonate, sodium acetate, and the like, in the presence of a lower alkanol and at a temperature in the range of 40 C. to C.

As to the phenylhydrazone derivatives of the instant discovery, the production thereof is generally accomplished by reacting a phenylhydrazine with a 4-phosphorinanone under nitrogen and in the presence of a lower alkanol. Temperatures in the range of 50 C. to 100 C. are generally employed.

The para-nitro-phenylhydrazone derivatives are produced in the same manner as the phenylhydrazone derivatives, save that para-nitro-phenylhydrazine is used in lieu of phenylhydrazine.

The oxirne derivatives of the present invention are prepared as in Example 4, above, using hydroxylarnine hydrochloride and an equivalent amount, basis the hydroxylarnine hydrochloride, of alkali metal hydroxide. The solvent used is water and temperatures in the range of 5 0 C. to 100 C. are employed.

The 4-phosphorinanone derivatives of the present invention have direct utility as gasoline additives. For example, up to about 10 milliliters of any one of these derivatives, when dissolved in one gallon of gasoline, affords protection against misfiring, surface ignition, and the like.

Clearly, the instant discovery encompasses numerous modifications within the skill of the art. Consequently, while the present invention has been described in detail with respect to specific embodiments thereof, it is not intended that these details be construed as limitations upon the scope of the invention, except insofar as they appear in the appended claims.

I claim:

1. A 4-phosphorinanone, semicarbazone of the formula of substituted and unsubstituted, branchedand straight chain alkyl having from 1 to 18 carbon atoms, cyclohexyl, substituted and unsubstituted phenyl; said substituents for alkyl being selected from the group consisting of lower alkoxy, phenyl and cyano, and said substituents for phenyl being selected from the group consisting of halogen and lower alkyl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chloro-subtsituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; and R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl.

2. 1,2,6-itriphenyl-4-phosphorinanone, semicarbazone.

No references cited.

ALEX MAZEL, Primary Examiner.

NICHOLAS S. RIZZO, Examiner.

HENRY R. JILES, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,281,463 October 25, 1966 Richard Parke Welcher It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 18, strike out "R in the above formulae represents a member selected"; same column 1, lines 65 to 72, the formula should appear as shown below instead of as in the patent: N OH R in the above formulae represents a member selected columns 3 and 4, TABLE I, third column, line 15 thereof, for "do" read phenylphosphine column 6, line 51, for "carbazine" read carbazide column 7, lines 12 to 20, the formula should appear as shown below instead of as in the patent:

2 6 m R R R 3 IIC 6 O m 4 HIN MI NHC R 8 2 /H C C 3 2 5 1 R R R Signed and sealed this 5th day of September 1967.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Commissioner of Patents Attesting Officer 

1. A 4-PHOSPHORINANONE, SEMICARBAZONE OF THE FORMULA 